Stock-Based Compensation (Details) (USD $)	3 Months Ended			6 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Dec. 31, 2010	Dec. 31, 2011	Dec. 31, 2010
Stock-based compensation, additional disclosures [Abstract]
Payments related to tax withholding on vested RSUs				$ 1,800,000	$ 1,000,000
Common stock reserved for future issuance or settlement under equity compensation plans (in shares)	11.9			11.9
Recorded as expense:
Total stock-based compensation	3,071,000		2,345,000	6,779,000	5,042,000
Cost of service and other [Member]
Recorded as expense:
Total stock-based compensation	314,000		233,000	617,000	486,000
General and administrative [Member]
Recorded as expense:
Total stock-based compensation	1,175,000		918,000	3,062,000	2,177,000
Research and development [Member]
Recorded as expense:
Total stock-based compensation	353,000		287,000	701,000	576,000
Selling and marketing [Member]
Recorded as expense:
Total stock-based compensation	1,229,000		907,000	2,399,000	1,803,000
Stock Options [Member]
General award terms [Abstract]
Award vesting period (in years)				4Y
Stock options contractual term, minimum (in years)				7Y
Stock options contractual term, maximum (in years)				10Y
Stock-based compensation accounting [Abstract]
Weighted average fair value of options granted (in dollars per share)	$ 6.49		$ 4.94	$ 6.48	$ 4.83
Weighted average assumptions: [Abstract]
Risk-free interest rate (in hundredths)				1.20%	1.30%
Expected dividend yield (in hundredths)				0.00%	0.00%
Expected life (in years)				4.57	4.49
Expected volatility factor (in hundredths)				49.60%	52.90%
Stock option activity [Roll Forward]
Outstanding, beginning of period (in shares)	5,208,044	4,724,305		4,724,305
Granted (in shares)	11,275	751,072
Exercised (in shares)	(283,628)	(243,024)
Cancelled / Forfeited (in shares)	(19,868)	(24,309)
Outstanding, end of period (in shares)	4,915,823	5,208,044		4,915,823
Exercisable (in shares)	3,691,917			3,691,917
Vested and expected to vest (in shares)	4,752,764			4,752,764
Stock options activity, additional disclosures [Abstract]
Weighted average exercise price, beginning of period (in dollars per share)	$ 8.69	$ 7.64		$ 7.64
Weighted average exercise price, granted (in dollars per share)	$ 16.45	$ 15.50		$ 16.45
Weighted average exercise price, exercised (in dollars per share)	$ 6.60	$ 9.17		$ 6.60
Weighted average exercise price, cancelled/forfeited (in dollars per share)	$ 12.98	$ 10.28
Weighted average exercise price, end of period (in dollars per share)	$ 8.81	$ 8.69		$ 8.81
Weighted average exercise price, exercisable (in dollars per share)	$ 7.27			$ 7.27
Weighted average exercise price, vested and expected to vest (in dollars per share)	$ 8.65			$ 8.65
Weighted average remaining contractual term, outstanding, end of period (in years)	5.3			5.3
Weighted average remaining contractual term, exercisable (in years)	4.2
Weighted average remaining contractual term, vested and expected to vest (in years)	5.2
Aggregate intrinsic value, outstanding, beginning of period	34,434,000	45,058,000		45,058,000
Aggregate intrinsic value, outstanding, end of period	41,965,000	34,434,000		41,965,000
Aggregate intrinsic value, exercisable	37,200,000			37,200,000
Aggregate intrinsic value, vested and expected to vest	41,334,000			41,334,000
Stock-based compensation, additional disclosures [Abstract]
Total unrecognized compensation cost	6,200,000			6,200,000
Total unrecognized compensation cost, period of recognition (in years)				3.1
Total intrinsic value of options exercised	3,200,000		2,600,000	5,000,000	2,700,000
Cash proceeds from option exercises				4,100,000	3,400,000
Restricted Stock Units [Member]
General award terms [Abstract]
Award vesting period (in years)				4Y
Restricted stock units activity [Roll Forward]
Outstanding, beginning of period (in shares)	1,945,228	1,338,376		1,338,376
Granted (in shares)	12,550	893,107
Settled (in shares)	(98,185)	(248,703)
Cancelled / Forfeited (in shares)	(26,578)	(37,552)
Outstanding, end of period (in shares)	1,833,015	1,945,228		1,833,015
Vested and expected to vest (in shares)	1,600,876			1,600,876
Restricted stock units activity, additional disclosures [Abstract]
Weighted average grant date fair value, beginning of period (in dollars per share)	$ 12.41	$ 10.19		$ 10.19
Weighted average grant date fair value, granted (in dollars per share)	$ 16.52	$ 15.50
Weighted average grant date fair value, settled (in dollars per share)	$ 13.45	$ 11.78
Weighted average grant date fair value, cancelled/forfeited (in dollars per share)	$ 12.48	$ 10.73		$ 12.48
Weighted average grant date fair value, outstanding, end of period (in dollars per share)	$ 8.39	$ 12.41		$ 8.39
Weighted average grant date fair value, expected to vest (in dollars per share)	$ 7.79			$ 7.79
Stock-based compensation, additional disclosures [Abstract]
Total fair value of shares vested from RSU grants	1,700,000		500,000	5,500,000	3,000,000
Total unrecognized compensation cost	17,900,000			17,900,000
Total unrecognized compensation cost, period of recognition (in years)				2.9
Payments related to tax withholding on vested RSUs				$ 1,800,000	$ 1,000,000